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https://issues.apache.org/jira/browse/HBASE-24302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HBASE-24302 started by Wellington Chevreuil.
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> Add an "ignoreTimestamps" option (defaulted to false) to HashTable/SyncTable
> tool
> ---------------------------------------------------------------------------------
>
> Key: HBASE-24302
> URL: https://issues.apache.org/jira/browse/HBASE-24302
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 3.0.0-alpha-1, 2.3.0, 2.2.5
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
>
> Currently, when hashing and comparing values between a source and a target
> table, HashTable/SyncTable always consider cell timestamp values. However,
> cell timestamp values are not always relevant for client applications, so
> these use cases could benefit of a more flexible comparison logic where
> timestamps could be ignored.
> For such scenarios, HashTable/SyncTable could have better performance, since
> cells with only timestamps diverging would not be copied.
> Another case that would benefit from this option is when bulk deletes are
> wrongly applied at target. At the moment, HashTable/SyncTable on it's own is
> not capable of syncing back the clusters, as the source Puts would have an
> older TS than the delete markers in the target. That would require target to
> complete major compaction on the whole table before HashTable/SyncTable could
> be run.
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